An accordion-type shutter assembly including a plurality of elongated vertically extending corrugated or flat shutter slats hingedly held together in an edge-to-edge arrangement for limited pivotal movement between adjacent slats between the assembly being open and closed. The shutter assembly is used to protect a window or door from flying object damage and building intrusion caused by storm or hurricane. The female hinge half along one of the edges of each slat has lengthwise extending rib reinforcements for greater impact resistance to better withstand the impact of airborne flying objects produced during storms and hurricanes.